Martin Jacobs, an avid memorabilia collector, with some of his 49ers items on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs, an avid memorabilia collector, with some of his...

Martin Jacobs shows some old game photos of 49ers games on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs shows some old game photos of 49ers games on...

Several items of memoribilia in Martin Jacobs's home on Thursday, January 24, 2013, include leather chin straps, game balls and equipment bags. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Several items of memoribilia in Martin Jacobs's home on Thursday,...

Martin Jacobs, an avid memorabilia collector, shows some a set of shoulder pads autographed by Hugh McElhenny on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs, an avid memorabilia collector, shows some a set of...

Martin Jacobs, an avid memorabilia collector, with some of his 49ers items on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs, an avid memorabilia collector, with some of his...

Martin Jacobs, an avid memorabilia collector, with some of his 49ers items on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs, an avid memorabilia collector, with some of his...

Martin Jacobs, an avid memorabilia collector, shows some of his 49ers photos on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs, an avid memorabilia collector, shows some of his...

Several items of memoribilia in Martin Jacobs's home on Thursday, January 24, 2013, include leather chin straps, game balls, jersies, and equipment bags. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Several items of memoribilia in Martin Jacobs's home on Thursday,...

Martin Jacobs shows a signed 49ers helmet in his home on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs shows a signed 49ers helmet in his home on Thursday,...

Several items of memoribilia in Martin Jacobs's home on Thursday, January 24, 2013, include leather chin straps, game balls and equipment bags. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Several items of memoribilia in Martin Jacobs's home on Thursday,...

Martin Jacobs shows a jersey from Hugh McElhenny that was patched multiple times when McElhenny played for the 49ers on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs shows a jersey from Hugh McElhenny that was patched...

Martin Jacobs in his home on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs in his home on Thursday, January 24, 2013. Jacobs has...

Martin Jacobs with some of his 49ers memoribilia in his home on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.

Photo: Carlos Avila Gonzalez, The Chronicle

Martin Jacobs with some of his 49ers memoribilia in his home on...

Martin Jacobs looks at a portrait of Hugh McElhenny in his home on Thursday, January 24, 2013. Jacobs has been collecting 49ers memorabilia since he was a kid watching games at Kezar Stadium. Now, the retired San Francisco resident has what might be the biggest 49ers memorabilia collection in the world and keeps some of it in his San Francisco, Calif., home.
Photo: Carlos Avila Gonzalez, The Chronicle